Lab 8: Nervous System

Introduction and brain pp. 216-219, p.230 questions1-3 Spinal nerves and spinal cord pp. 219, p.230 questions 4-7 Human & sheep eye pp. 221-224, p.230 questions 8-10 The human ear pp. 225, p.230 questions 11-13 Sensory receptors pp. 227-229

Mammalian Brain pp. 216-219 -Use the model on display and the dissected sheep brain to identify the following portions in lateral, ventral and cross-section views: cerebrum, frontal lobe, parietal lobe, occipital lobe, temporal lobe, cerebellum, thalamus, hypothalamus, diencephalon, midbrain, pons, medulla oblongata, ventricles. -Identify the pituitary gland in the human brain and its function -Endocrine gland that secretes hormones which regulate many body activities -Known historically as Master Gland but is actually directed by hypothalamus

Spinal Nerves pp. 219 -Identify sensory neurons, interneurons, and motor neurons and their function -Why is each type of neuron important? -View station on spinal cord (no slide for observation)

Human and Sheep Eye pp.221-224 -We will break into 2 halves and go through sheep eye dissection as a demo with structure & function included -You will not be doing your own dissection so place close attention during my demo -You will be responsible for the following: sclera, cornea, choroid, retina, rod cells, cone cells, fovea centralis, lens, cilliary body, iris, pupil, aqueous humor, vitreous humor, and optic nerve -Be sure to review the eye using the model -Complete blind spot of the eye experiment -Complete accommodation of the eye experiment -Optional: watch video on lens replacement on human eye (cataract surgey)

Human Ear pp.225 -Use the model and your manual to identify the following parts of the ear: pinna, auditory canal, tympanic membrane, malleus (hammer), incus (anvil), stapes (stirrups), auditory tube, semicircular canals, cochlea, vestibule, cochlear nerve, and vestibular nerve -Mechanoreceptors for inner ear are hair (cilia) which help send signals to the brain for hearing and for balance -Complete the locating sound experiment using a tuning fork

Sensory Receptors pp.227-229 -Receptors aid in sending information to the brain for processing -Omit human skin on p.226 -Complete touch receptor experiment -Complete temperature experiment -Omit chemoreceptors on p.228

You should be able to answer questions 1-13 on page 230